Structure and kinematics of the Marmion Shear Zone and implications for Archean tectonics and gold mineralization at the Osisko Hammond Reef Gold Project.

马米恩剪切带的结构和运动学以及对奥西斯科哈蒙德礁金矿项目太古代构造和金矿化的影响。

• 批准号: 430891-2012
• 负责人: Rowe, Christen
• 金额: $ 1.78万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=498349
• 关键词: Structure; kinematics; Marmion; Shear; Zone

The Hammond Reef gold deposit near Atikokan, Ontario, lies in an unusual tectonic setting. Unlike most of the Abitibi gold, which is deposited along fault zones and often related to fluid migration from magmatic or metamorphic systems in greenstones and associated metasediments. The Hammond Reef deposit is disseminated in an altered fracture zone within tonalitic gneiss. This fracture zone is sub-parallel and adjacent to the Marmion Shear Zone, a potentially large-scale Archean strike-slip structure. It is not known whether the alteration zone, and the gold deposit, formed due to activity of the Marmion Shear or are related to other processes and other tectonic events in the area.

安大略省阿提科坎附近的哈蒙德礁金矿位于一种不同寻常的构造环境中。与大多数Abitibi金不同，Abitibi金沿断裂带沉积，经常与绿岩和相关变质岩中岩浆或变质系统的流体迁移有关。哈蒙德礁矿床散布在英云闪长质片麻岩中的蚀变破碎带中。该断裂带是次平行的，与马米翁剪切带相邻，马米翁剪切带是一个潜在的大规模太古代走滑构造。目前尚不清楚该蚀变带和金矿床是由Marmion剪切活动形成的，还是与该地区的其他过程和其他构造事件有关。